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elbertihtl

7-zip 9.28b - Compression Performance: 7-zip, Magicrar, Winrar, Winzip

-2 Hide ElDani , March 19, 2013 7:18 AM Thanks for this review, but I cannot agree with your results, because mine are staggeringly different! Here are some stats from a comparison I did myself, on a scenario of some files, that are being compressed and sent to a backup-server on the Internet every single day. This is, in effect, a real practical example and not some random test data, which may or may not show the same characteristics as many of the available benchmarks. The data from my tests may not be as scientifically accurate as yours in this review, mainly because this is not a clean workstation and the files were both read from and written to the same HDD, I fully understand that fact. But the results are still so significantly different, that some minor deviations from the hard-drive performance or background applications like an idle browser or the deactivated Avast! won't make much difference to the results. The hardware and operating system used in my test: Windows 7 SP1 64-bit Intel i5-2500K (turbo deactivated, all 4 cores at 3.7 GHz) 16GB Kingston DDR3-1333 CL9 RAM The programs I used: 962 files, total size 614.87 MB, average size ~ 655 KB types are html, js, php and cgi in that order The WinRAR settings I currently use: rar, best compression, solid archive, lock archive, force text compression, 1024 KB dictionary size The 7-Zip settings I tried (all with 4 threads): a) 7z, ultra, lzma2, rest default values (32 MB dictionary, 64 word size, 4 GB block size) b) 7z, maximum, lzma2, solid block size, rest default values (32 MB dictionary, 64 word size) c) 7z, maximum, lzma2, 8 MB dictionary, 32 word size, solid block size The results of the compression tests: WinRAR - 125.62 MB - 2:12 minutes 7-Zip a) - 142.21 MB - 5:10 minutes 7-Zip b) - 144.48 MB - 4:33 minutes 7-Zip c) - 149.99 MB - 3:00 minutes In the end, WinRAR is both one third faster than the fastest 7-Zip settings I used and it creates an over ten percent smaller archive than the smallest alternative file. Maybe there is some unknown "golden setting" that I could achieve, by playing around with the dictionary, word and block sizes in 7-Zip.

Original article here: http://www.tomshardware.com/reviews/winrar-winzip-7-zip-magicrar,3436.html

Bandizip is probably the best free file archiver right now | gHacks Technology News

bandizip 7-Zip is the only one of our four archiving and compression tools thats free. Its open source and offered under the GNU Lesser General Public License. 7-Zip fully supports the following seven compression formats: 7z, bzip2, GZIP, TAR, WIM, XZ, and ZIP. Additionally, 7-Zip can extract an additional 24 formats: ARJ, CAB, CHM, cpio, cramfs, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR, and Z. According to its webpage, 7-Zips compression performance for ZIP and GZIP formats is between 2 and 10 percent superior to that of its competition, and our benchmarks support this claim. The app's excellent support for its own 7z compression and archiving format is another strong point. 7z is based on an open architecture with optional 256-bit AES encryption. This format achieved the highest compression rates in our benchmarks. 7-Zip defaults to the Lempel-Ziv-Markov Algorithm (LZMA) for compression with 7z, but it can also be configured to use LZMA2, PPMd, and bzip2. Moreover, it supports WinZip AES encryption, making it possible to create ZIP archives with 256-bit AES encryption.

Original article here: http://www.tomshardware.com/reviews/winrar-winzip-7-zip-magicrar,3436-2.html

7-Zip does not support the new RAR5 format that was visit the site introduced back in 2013 and cannot open folders automatically after extraction. I decided to look for an alternative that would tick all the boxes without sacrificing anything. Plus, the program had to be available freely as well as I had no intention of spending money for an archiver. I reviewed Bandizip in 2011 for the first time and liked it a lot back then. The developing company has improved the application over the years so that it is not supporting all the features that I require from a file archiver. What those are? Glad you asked. Format compatibility - The program needs to support all major archive formats including zip, 7z, rar (including rar5), gz, ace, tar and others in terms of extraction, and major formats when it comes to archive creation. Convenience - Options to extract one or multiple archives from Windows Explorer and to open extracted folders after extraction. Other features - Unicode support is a must, as are options to customize the context menu and other program features.

Original article here: http://www.ghacks.net/2014/06/24/bandizip-probably-best-free-file-archiver-right-now/

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Schweinderl